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-rw-r--r--net/sched/sch_blackhole.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/net/sched/sch_blackhole.c b/net/sched/sch_blackhole.c
new file mode 100644
index 0000000000..a7f7667ae9
--- /dev/null
+++ b/net/sched/sch_blackhole.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/sched/sch_blackhole.c Black hole queue
+ *
+ * Authors: Thomas Graf <tgraf@suug.ch>
+ *
+ * Note: Quantum tunneling is not supported.
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <net/pkt_sched.h>
+
+static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
+ struct sk_buff **to_free)
+{
+ qdisc_drop(skb, sch, to_free);
+ return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
+}
+
+static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
+{
+ return NULL;
+}
+
+static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
+ .id = "blackhole",
+ .priv_size = 0,
+ .enqueue = blackhole_enqueue,
+ .dequeue = blackhole_dequeue,
+ .peek = blackhole_dequeue,
+ .owner = THIS_MODULE,
+};
+
+static int __init blackhole_init(void)
+{
+ return register_qdisc(&blackhole_qdisc_ops);
+}
+device_initcall(blackhole_init)